Thanks for your information. However, please be advised this is a false positive due to some invalid mod_security regular expression rules. See the link below to details on why this is happening, and a method by which it can be fixed.
In laymen terms: this issue is due to an invalid server configuration – not an issue with the commonly used library ‘jquery.cookie.js’.
https://www.modsecurity.org/tracker/browse/CORERULES-29
None of our plugins use any form of cross-site scripting.